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What is wanted is not the will to believe, but the will to find out, which is the exact opposite.

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When two men of science disagree, they do not invoke the secular arm; they wait for further evidence to decide the issue, because, as men of science, ...more

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The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.

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The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.

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One of the symptoms of an approaching nervous breakdown is the belief that one's work is terribly important.

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Against my will, in the course of my travels, the belief that everything worth knowing was known at Cambridge gradually wore off. In this respect my t...more

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Every man wherever he goes is encompassed by a cloud of comforting convictions which move with him like flies on a summer day.

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It is not what the man of science believes that distinguishes him, but how and why he believes it. His beliefs are tentative, not dogmatic; they are b...more

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The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority o...more

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I wish to propose for the reader's favourable consideration a doctrine which may, I fear, appear wildly paradoxical and subversive. The doctrine in qu...more

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My desire and wish is that the things I start with should be so obvious that you wonder why I spend my time stating them. This is what I aim at becaus...more

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I went to Russia a Communist; but contact with those who have no doubts has intensified a thousandfold my own doubts, not as to Communism in itself, b...more

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I do not pretend to be able to prove that there is no God. I equally cannot prove that Satan is a fiction. The Christian god may exist; so may the god...more